Where did you source your cork spacers? I've got the rest of my parts for my UC build coming. I'm still trying to work out spacers.
Kevin T

Kevin,
My spacers were described as 4" cork rounds, 3mm thick. ordered from Consumer Crafts. It's easy to glue as many as you want together to create whatever spacer thickness you need. I used a drill press to drill the center hole.
But there is a problem with these. They aren't 4" in diameter. They're about 1/8" shy, and therefore don't completely cover the record label!
This isn't a problem for me, as my rotation speed is slow (12 min per revolution), that the liquid drains off before it can drip over the label.
But, you might want to search somewhere for a 4.5" cork round to be safe. I don't know if there is such a beast.

Thanks. I'll check some of the local craft stores to see what I can come up with. My rotation motor is a 1 RPM so I may need to ensure full label coverage just in case. I still have a few parts to get before I'm done, but so far things look promising to finish by next weekend.

I too have been looking for some spacers that would also protect the label but be rigid enough to be clamped with sufficient force to make sure the record rotates. I have seen where someone cut their own spacers out of a plastic cutting board that you can find just about anywhere. You would just use a hole saw to make them. I think I will use drink coasters which are 4.25 inches square and are made of thin hardboard with a cork coating. They are available at Walmart and other places and are really cheap. I'll probably make a little circle jig for my router to make them round. A small area of the label will be exposed at 4 spots since they are just a tiny bit small. I don't think there will be any problem with slow rotation and I really want the lead out groove to be spic and span. I'll submerge the record very close to the label.

If you're going to the trouble of cutting the spacers, it might be cheaper to buy cork sheet or wood, rather than finished products like cutting boards or coasters.

Another option would be to buy cork stoppers.
I've ordered these from the UK: 110mm by 105mm tapered cork stoppers - they should cover the record label completely and very little of the lead out groove. They are just a touch over 1" thick, which is my optimal spacing.No.37 Natural Cork Stopper 110mm from Just Cork No. 37 Large

The UK ones end up about the same delivered cost for me. The stoppers are cheaper, offset by higher shipping. But the sizing looks perfect to me.
Note the US and UK seem to have different systems of numbering stoppers.

I too have been looking for some spacers that would also protect the label but be rigid enough to be clamped with sufficient force to make sure the record rotates.

LFM - Aside from my spacer suggestions in the last message, I'll pass on the fact that I've found very little clamping force is required to make the records spin. The agglomerated cork I'm using so far is non-slip (we'll see about the UK natural cork I ordered). In the photos of my unit, you'll see white nylon spacers that I'm using. These had a 1/4 ID when bought at the hardware store.
I reamed the one nearest my motor just slightly so that it was a press fit over my 9/32" drill rod spindle. The one on the other end was reamed to a resistance fit over the 9/32 drill rod. It can be slid on after the records are in place, and pushed up against my outside label protector. It can easily be set snug enough to slightly compress the cork assure record rotation --- no other type of firm clamping is required.

I found some 4" round weatherproof Carlon outlet covers at Home Depot. They were $2.54 each. I just drilled a 1/4" hole in the center and super glued the supplied foam ring to the back. I get full label coverage with these covers. I bought 8 of them so that I can load 4 LPs on the spindle for cleaning.